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Statistics Test...

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  • Question 1
    1 / -0

    The mean of a distribution is $$14$$ and standard deviation is $$5$$. What is the value of the coefficient of variation?

  • Question 2
    1 / -0

    Find variance for following data:

    Class$$0-10$$$$10-20$$$$20-30$$$$30-40$$$$40-50$$$$50-60$$$$60-70$$
    frequency$$6$$$$5$$$$8$$$$15$$$$7$$$$6$$$$3$$

  • Question 3
    1 / -0

    The degree to which numerical data tend to spread about value is called

  • Question 4
    1 / -0

    The SD of following:

    Age$$20-25$$$$25-30$$$$30-35$$$$35-40$$$$40-45$$$$45-50$$
    Number of persons$$170$$$$110$$$$80$$$$45$$$$40$$$$35$$

  • Question 5
    1 / -0

    If $$x $$ is increased by $$k$$ then $$\sigma$$  changes to

  • Question 6
    1 / -0

    Find variance for following data:

    Marks$$0-4$$$$5-9$$$$10-14$$$$15-19$$$$20-24$$$$25-29$$$$30-34$$$$35-39$$
    Frquency$$2$$$$5$$$$7$$$$13$$$$21$$$$16$$$$8$$$$3$$

  • Question 7
    1 / -0

    The variance and SD of the following is

    $$x$$$$4.5$$$$14.5$$$$24.5$$$$34.5$$$$44.5$$$$54.5$$$$64.5$$
    $$f$$$$1$$$$5$$$$12$$$$22$$$$17$$$$9$$$$4$$
     

  • Question 8
    1 / -0

    If $$x $$ is multiplied by $$k$$ then $$\sigma$$  changes to

  • Question 9
    1 / -0

    Standard Deviation of n observations $$a_1, a_2, a_3 .....a_n$$ is $$\sigma$$ Then the standard deviation of the observations $$\lambda a_1, \lambda a_2, ..., \lambda a_n$$ is

  • Question 10
    1 / -0

    The mean deviation from the data $$3, 10, 10, 4, 7, 10, 5$$.

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